$5a^2-10b^2$
$\left(3p^2-q\right)^3$
$b\left(a+1\right)-a-1$
$\left(6x^2+2c\right)^3$
$\left(6.7\right)\:-18\::\:\left(-6\right)$
$x^2-x<5$
$\frac{1}{2}\left(12m-4\right)+2\left(m+1\right)$
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